I made a big throwing knife many years ago, and used mountain sheep horn for the scales. The knife eventually broke where I had silver soldered a brass cross guard to the blade, but the scales seemed to be unbreakable. They were attached to the handle steel with three 1/4" steel rivets, and were protected by a pair of brass pieces forming a pommel. In those days, I had a good throwing arm, and would often throw the knife from two and three turns - about 23 yards. That was its demise.